Tamron Zoom Shootout (28-75, 28-200, 35-150 EF, and 70-180)
hasenbein wrote:
Sharpness tests should always be done in MANUAL FOCUS, period.
I frequently use AF-S in 12.4x with very satisfactory results on most lenses, so this is every bit as much as part of the test as far as I'm concerned. I am not setting up a 28-200 on a tripod and using 2 second shutter delays for most shots. I am hiking 3+ mph covering lots of ground firing off shots while staying ahead of my friends or trying to catch up because I just took too many shots. I am simply sharing information, and for me, a lens should be able to AF-S in 12.4x accurately, or else it should be exposed that it does not. the 35-150 is adapted and does not, so I know not to bring that along if I'm covering miles with a group. It still has value to me, but TESTING made it obvious it requires MF. The 70-180 and 28-75 showed me they do NOT require MF to give satisfactory and consistent results. the 28-200 is a mixed bag to me now. I know it can be great. I know it might miss when I thought it was just fine. I would love to AF-C in 12.4x magnification, but Sony doesn't do that, so I have to either AF-C with a small spot focus, AF-S in 12.4x and just accept missed shots, shoot more shots refocusing each time, chimp after shots, or accept that I am slowing way the eff down and MF (which is suuuper satisfying on the 35-150 because it's a DSLR lens with mechanical coupling! but less so on any mirrorless lens...). and FWIW i did tests of the 28-75, 70-180, 35-150 and 24-105 that I never posted where I used both AF-S in 12.4x and MF for each lens. I would then go through and rate the better one of the two and use that for the comparison. guess what? it was not a statistically significant difference for any of those lenses other than the aforementioned adapted lens. which is why I knew it NEEDED to be used in MF for a test
Re: Tamron Zoom Shootout (28-75, 28-200, 35-150 EF, and 70-180)
hasenbein wrote:
Sharpness tests should always be done in MANUAL FOCUS, period.
I frequently use AF-S in 12.4x with very satisfactory results on most lenses, so this is every bit as much as part of the test as far as I'm concerned. I am not setting up a 28-200 on a tripod and using 2 second shutter delays for most shots. I am hiking 3+ mph covering lots of ground firing off shots while staying ahead of my friends or trying to catch up because I just took too many shots. I am simply sharing information, and for me, a lens should be able to AF-S in 12.4x accurately, or else it should be exposed that it does not. the 35-150 is adapted and does not, so I know not to bring that along if I'm covering miles with a group. It still has value to me, but TESTING made it obvious it requires MF. The 70-180 and 28-75 showed me they do NOT require MF to give satisfactory and consistent results. the 28-200 is a mixed bag to me now. I know it can be great. I know it might miss when I thought it was just fine. I would love to AF-C in 12.4x magnification, but Sony doesn't do that, so I have to either AF-C with a small spot focus, AF-S in 12.4x and just accept missed shots, shoot more shots refocusing each time, chimp after shots, or accept that I am slowing way the eff down and MF (which is suuuper satisfying on the 35-150 because it's a DSLR lens with mechanical coupling! but less so on any mirrorless lens...).
Jun 30, 2020 at 04:04 AM
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